tl;dr: F-Droid frames Google's mandatory Android Developer Verification (ADV) — rolling out September 30 in Brazil, Indonesia, Singapore, and Thailand — as a trojan-like system service that will block installation of apps from developers not centrally registered with Google. They argue the program does little to actually prevent malware distribution, forces developers to hand over ID and agree to vague terms where "malware" is undefined (and could be weaponized against ad-blockers or other disfavored software), and threatens F-Droid's open-source distribution model despite widespread opposition from EFF, FSF, ACLU, and over 70 organizations.